Color Quartz Application Guide
Preparation for Epoxy Coatings Applications
preparation is the most critical aspect of resinous flooring applications.
Thorough preparation maximizes adhesion and long-term integrity of the floor
- New concrete
should have an effective moisture vapor barrier.
- Concrete must
cure for 28 days prior to the application of coatings.
compounds should not be used on new concrete pours where a resinous coating
system is to be used.
- New concrete
should be prepared by shot-blasting or careful acid etching to provide a
5.0-10.0 mil surface profile.
& PREVIOUSLY COATED CONCRETE
- Old slabs must
be structurally sound and free of contaminants such as dirt, grease, oil,
mastics and unsound coatings.
- Grease must be
removed from the floor surface and subsurface.
- Mastics from
carpet and floor tile must be thoroughly removed.
- Old coatings,
except for well-adhered epoxy coatings, must be removed by mechanical grinding
- After removal
of the above listed contaminants, concrete must be shot-blasted or acid-etched
to provide a 5.0-10.0 mil surface profile.
VAPOR EMISSIONS TESTING
- All interior
concrete floors are subject to possible moisture vapor drive, which may cause
coating failure. Prior to application of coatings, calcium chloride testing
should be done according to the procedures of ASTM Standard Practice
E 1907-97. Test kits are
available from Excellent Coatings International Epoxy floor coating tolerances do not
exceed 3.0 lbs. per square ft / 24 hours.
INTERIOR HOLES, CRACKS AND JOINTS
- As part of the
initial surface preparation for thin film epoxy or polyurethane coatings, cracks
and holes should be filled using an epoxy crack repair material or similar type
epoxy approved by Excellent Coatings International may be used.
- Cracks must be
routed out, primed and then filled with epoxy crack repair material.
joints are to be honored. For expansion joints, it is appropriate to use an
elastomeric polyurethane caulk. Confirm that the expansion joint caulk material
is compatible with the Excellent Coatings International floor coating products you are
using. Caulking shall be carefully installed after the epoxy coatings have been
- If acid
etching, the area to be treated and surrounding areas that may be damaged by
contact with acid solution must be thoroughly pre-wet with water. Keep
substrate surface and surrounding areas wet during the etching process. Never
allow the acid solution to dry on the surface.
- Acid etching is
a two-man procedure with one man operating a floor machine (with a nylogrit
brush) while the other man is responsible for pouring the diluted acid solution
(1 part acid: 3-4 parts water; but a stronger solution may be needed for hard,
smooth and shiny concrete).
- The acid
solution is carefully poured onto the pre-wet surface. Be careful not to splash
the solution onto adjacent areas and note that acid solution will damage
aluminum and painted metal surfaces. Do not get acid solution on concrete areas
that are not to be coated.
- After acid
solution is applied, scrub the floor using a floor machine and broom (in the
hard-to-get areas). Scrub in both directions, left to right and then up and
rinse area with clean water. Test pH to ensure a neutral pH balance. If
necessary, neutralize the surface using a baking soda/water solution.
- Surface must be
thoroughly dry before coatings are applied. This may take several days,
depending on the humidity and temperature.
- Confirm with
local water and wastewater management agencies that you are able to use this
method of surface preparation in the area where work is to be done. It may not
be allowed or they may require that you neutralize effluence before it hits the
drainage system. You may be required to contain and dispose of effluence
elsewhere. Fines may be issued if local regulations are not abided.
is a preferred method of preparation when time is an issue. Shot-blasting shall
be done to achieve a 5.0-10.0 mil surface profile. A steel shot-blasted floor
may be primed once all the steel shot has been picked up and the floor is swept
and blown clean of residual dust.
- Safety glasses,
appropriate footwear and respirators should be worn at all times by the
mechanics doing the work.
- Pilot lights
and electrical switches in an enclosed area must be turned OFF before and during
the application of solvent-based coatings. Once fumes from coatings
have completely dissipated, pilot light flame(s) may be re-ignited.